CN1327520A - Ferroelectric fluid flow control valve - Google Patents
Ferroelectric fluid flow control valve Download PDFInfo
- Publication number
- CN1327520A CN1327520A CN98814354A CN98814354A CN1327520A CN 1327520 A CN1327520 A CN 1327520A CN 98814354 A CN98814354 A CN 98814354A CN 98814354 A CN98814354 A CN 98814354A CN 1327520 A CN1327520 A CN 1327520A
- Authority
- CN
- China
- Prior art keywords
- driver
- fluid
- voltage
- plane
- shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 40
- 238000009413 insulation Methods 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 239000012212 insulator Substances 0.000 claims description 7
- 238000002955 isolation Methods 0.000 claims description 3
- 230000005764 inhibitory process Effects 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims 1
- 230000008901 benefit Effects 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- KRQUFUKTQHISJB-YYADALCUSA-N 2-[(E)-N-[2-(4-chlorophenoxy)propoxy]-C-propylcarbonimidoyl]-3-hydroxy-5-(thian-3-yl)cyclohex-2-en-1-one Chemical compound CCC\C(=N/OCC(C)OC1=CC=C(Cl)C=C1)C1=C(O)CC(CC1=O)C1CCCSC1 KRQUFUKTQHISJB-YYADALCUSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000004816 latex Substances 0.000 description 2
- 229920000126 latex Polymers 0.000 description 2
- 239000000615 nonconductor Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012811 non-conductive material Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/004—Actuating devices; Operating means; Releasing devices actuated by piezoelectric means
- F16K31/005—Piezo-electric benders
Abstract
An active valve is controleld and driven by external electrical actuation of a ferroelectric actuator to provide for improved passage of the fluid during certain time periods and to provided positive closure of the valve during other time periods. The valve provides improved passage in the direction of flow and positive closure in the direction against the flow. The actuator is a dome shaped internally prestressed ferroelectric actuator having a curvature, said dome shaped internally prestressed ferroelectric actuator having a curvature, said dome shaped actuator having a rim and an apex, and a dome height measured from a plane through said rim said apex that varies with an electric voltage applied between an inside and an outside surface of said dome shaped actuator.
Description
Cross reference to related application
The application is relevant with the PCT patent application of the following same Applicant that is not authorized, application number: _ _, to submit in 1998 years _ month _ days, title is " ferroelectric pump ".
Affiliated field
The application relates to a kind of fluid flow control valve, is specifically related to a kind of ferroelectric active fluid flow control valve, and it provides the fluid passage of improvement in certain time period, provides definite closing in the other times section.
Description of Related Art
The mobile occasion of fluid needs a kind of valve usually, for fluid provides without hindrance passage, does not have the fluid passage in the other times section certain time period." one-way valve ", just normal " safety check " said, a kind of valve comes to this.It provides a without hindrance fluid passage (" on flow direction ") in one direction, and in the opposite direction (" going up in the opposite direction with stream ") do not provide the fluid passage.
The acting in opposition that existing safety check utilizes fluid to flow comes the actuating valve action, also can drive with electromagnetism or other and drive valve.These passive check valves need fluid to come the actuating valve action.Need fluid come actuating valve can cause undesirable with flow to opposite resistance.The active force loss that this causes pump to provide.Also has the closed undesirable fluid volume amount (flowing) that needs of the valve that fluid causes by wrong direction.This shadow region requires pump to carry fluid flow useless.Existing active safety check needs complex mechanism to drive to realize external electric.Summary of the invention
Therefore, an object of the present invention is to provide a kind of aggressive valve of handling control and driving by external electric.
Another purpose provides a kind of valve, and this valve does not provide passage to fluid providing without hindrance passage to fluid in the section sometime in the other times section.
Another purpose of the present invention provides a kind of valve that does not need with the fluid drives valve events.
A further object of the present invention provides a kind of valve that utilizes ferroelectric parts opening and closing fluid to flow.
A further object of the present invention provides the valve that a kind of utilization has the interior ferroelectric driver of pre-stress type of dome shape of a curvature, described dome shape driver has an edge and summit, with a dome height, this highly is to measure from the plane through described edge to obtain to distance the described summit, and the voltage between the outside changes this height in the described dome shape driver with being applied to.
A further object of the invention provides a kind of valve that can move with upper frequency before float (floating) occurs.
A further object of the present invention provides a kind of valve that can isolate chemistry and pollute.
Other purposes of the present invention and advantage will be more obvious by following accompanying drawing and specific descriptions.
Brief summary of the invention
According to the present invention, by providing an aggressive valve can realize aforementioned and other purposes and advantage, this valve is handled control by external electric and is driven, and so that the fluid passage of improvement to be provided in certain time period, and provides definite closing (positive c1osure) in the other times section.This valve provides the passage of improvement at flow direction, provides definite closing in the direction with flowing opposite.
The drawing explanation
By detailed description below in conjunction with accompanying drawing, will understand all sidedly better the present invention and many advantages of bringing thereof, wherein:
Fig. 1 is the exploded view of control valve for fluids.
Fig. 2 electrically contacts ring according to one of the present invention.
The detailed description of most preferred embodiment
Fig. 1 illustrates the exploded view of ferroelectric flow control valve.Fluid enters in the valve by the pipe joint inlet 12 that is positioned in the top cover 10.Fluid is from this inlet flow valves chock 16.Between top cover 10 and shell 18, place a suitable sealing gasket 14.Insulation diaphragm 22 should with fluid, latex for example adapts and has certain elasticity.Insulation diaphragm 22 stretches to cover the whole surface of ferroelectric driver 26; Diaphragm contacts with driver 26 surfaces of motion all the time.If insulation diaphragm 22 has a plurality of purposes, it is as Sealing and be used for making fluid and driver 26 maintenance electricity and chemical isolation.By the motion of driver 26, the insulation diaphragm contacts then with the border of described valve chock 16 and separates, thus between it and valve chock 16 cylindrical gap of generation or close this cylindrical gap.Driver 26 is ferroelectric drivers of pre-stress type in the dome shape, it has a curvature, described dome-shaped driver has an edge, a summit and a dome height that measures to this summit from the plane through this edge, and this height changes with the voltage between the inner and outer surface that is applied to the dome shape driver.The example of this driver is disclosed in U.S. Pat 5,471, No. 721 " Method For Making Monolithic PrestressedCeramic Devices " also can be from aura ceramics (Aura Ceramics) and U.S. Pat 5,632, learn that these two pieces of patents are incorporated herein by reference in No. 841 " Thin Layer Composite Unimorph Ferroeletric Driver andSensor ".The voltage that is added on the ferroelectric driver produces an electric field between driver two surfaces, and consequently the driver shape changes.Driver will flatten or uprise according to the polarity of applied field.This ferroelectric driver shows the favourable balance between the scope of power of mechanical motion scope and its output inherently.The power of a certain amount of motion and generation is determined in the selection of ferroelectric driver size together in company with voltage that applies and frequency.This ferroelectric driver can have big distortion to several times also can bear at least 10 pounds load.Can be installed in worker's capacity that a plurality of ferroelectric driver on the common manifold (manifold) increases pump by employing.Can obtain the big displacement of twice from a pair of driver, two drivers stack by periphery with clam shell form edge.If also need bigger displacement, several such clam shell assemblies can be stacked.This layout is described in the following patent: US5,471,721 " Methodfor Making Monolithic Prestressed Ceramic Devies " and US5,632,841 " Thin Layer Composite Unimorph Ferroelectric Driver andSensor ".
Cylindrical gap opens and closes according to the displacement of driver 26.During cylindrical gap was opened, fluid left valve through housing outlet 19.The internal diameter size of pipe joint 12 and valve chock 16 should be definite like this: when fluid flow through the gap that is produced by driver 26 displacements, it is constant that flow velocity keeps.This has just been avoided undesirable pressure to fall.Different with existing valve, do not need to come driven diaphragm with air impeller or electromagnetic driver.Driver and relevant assembling set thereof are carried out the dual functions of diaphragm and air impeller/electromagnetic driver.
Ferroelectric driver 26 is installed like this: mounting structure is with driver 26 and fluid isolation, for the voltage that is applied on the driver 26 provides a route, when producing full displacement, provide definite inhibition (positive cortainment) for driver 26 according to the voltage driver 26 that is applied.Shell 18 is arranged between top cover 10 and the bottom 34.The driver mounting structure comprises that two nonconducting sealing gaskets 20 and 22, two of 32, one electrical insulators electrically contact 24 and 30, one driver pads 28 of ring and a driver 26.Pad 28 is preferably identical with driver 26 thickness.Driver 26 is positioned at pad 28, and the circumference of driver 26 contacts with the inner circumference of pad 28.Electrically contacting ring 24 and 30 is arranged in each side of pad 28 and is in contact with it and contacts for driver 26 provides voltage.Electrical insulator 22 is arranged to contact with the outer surface of last contact ring 24 and is concentric with driver 26.This insulator 22 should with the medium of pumping, latex for example adapts and has certain elasticity.Between insulator 22 and driver 26, adopt a kind of non-conductive fluid, such as silicon fluid.This fluid other materials relatively has chemical stability and has suitable viscosity so that insulator 22 and driver 26 combine.This will eliminate airbag, increase efficient and capacity.Sealing gasket 20 has a hole concentric with the hole of contact ring 24, and sealing pad 20 contacts with insulator 22.Sealing gasket 20 is made by electrically non-conductive material such as rubber.Mounting assembly is fixing by fastening piece such as positioning screwn (set screw).Needed fastening force only is the power of the needed minimum of suitable fixing-assembly.Do not need prestressing force.
This structure does not limit any concrete quantity, thickness or the size of driver.Each concrete application all should be considered the structural parameter of parts; For example, the ability of driver displacement amount and driving force.
Voltage lead 36 is positioned in the shell 18 through a boring in the shell 18.Positioning screwn spring (set screw spring) 38 in voltage lead 36 and the shell 18 contacts.Spring 38 with electrically contact ring 24 and contact to encircling 24 the voltage that is applied is provided.Contact ring 24 covers part pad and driver.As shown in Figure 2, some is 40 overlapping with driver for contact ring 24, and this lap 40 is electric conductor such as aluminium foil.The outside 42 of the contact ring 24 that contacts with driver is non-conducting materials, and it has a current-carrying part 44 that contacts with screw spring 38.Gummed paper is a kind of suitable non-conducting material.Though circular drives device and relevant circular mounting parts thereof are best, also can adopt other shapes.
The generating positive and negative voltage value that is added on the driver changes with the thickness of driver, the year the too big voltage electric arc that produces change.
In an alternate embodiments, insulation diaphragm 22 and driver 26 that preamble is described are an integral body.In this embodiment, whole driver 26 (both sides and edge) is encapsulated in the polymer coating.
This ferroelectric actuating valve mechanism is than electromagnetism and pneumatic mechanism light weight, so can work under high frequency before unsteady problem occurs.This valve has been eliminated the dead band that existing valve especially exists in the passive valve, and this valve is simpler than existing valve, efficient is higher.
Obviously, according to above-mentioned instruction, the present invention is made a lot of additional modifications and conversion is possible.Therefore be understandable that within the scope of the claims,, can also implement this invention by other means except pressing specifically described mode here.
Claims (7)
1. ferroelectric active control valve for fluids, it comprises:
A shell;
Fluid entrance device through described shell;
Fluid output device through described shell;
Dome shape, the ferroelectric driver of interior pre-stress type, it has a curvature, described dome shape driver has an edge and a summit, and the dome height from measuring to described summit through the plane at described edge, this dome height changes with the voltage that is applied between the described dome shape driver inner and outer surface;
Be used for installing the erecting device of described driver, this device makes driver and described fluid isolation, for the described voltage that is applied on the described driver provides a path, and when allowing the described voltage of each described actuator response to produce full displacement, for described driver provides definite inhibition (positive containment); With
Valve chock device docks with input device together with described erecting device, thereby the displacement of described driver opens and closes a cylindrical mobile district, and fluid enters described output unit through this district.
2. device according to claim 1, wherein said inlet device comprise a pipe joint.
3. device according to claim 1, wherein said outlet device are passages by described shell.
4. device according to claim 1, wherein said shell comprise a top cover and bottom.
5. device according to claim 1, the size in wherein said cylindrical mobile district make the liquid speed that flows through described inlet device and described outlet device keep constant.
6. device according to claim 1, wherein said erecting device comprises:
A pad, it has the first pad plane and the second pad plane, and a central opening is arranged, and described driver is positioned at this central opening, thereby the external boundary of described driver contacts with described opening border;
Two electric contacting layers, each contact layer has a central opening, the first described contact layer is set to contact with the part on the described first pad plane, and the second described contact layer is set to contact with the part on the described second pad plane, for described driver provides the voltage contact;
An insulation diaphragm, it has the first insulation plane and the second insulation plane, and the described first insulation plane is positioned at the first described contact layer center, top and contacts with the part of its outer surface, and in described driver top center position;
Non conducting fluid between described driver and described insulator, this fluid has suitable viscosity, and described insulator and described driver are combined;
A non-conductive sealing gasket, it has a central opening, is centrally placed in directly over the described insulation diaphragm and is set to contact with described insulation diaphragm;
A non-conductive sealing gasket, be positioned at the second described contact layer directly over and be set to contact with this contact layer; With
Securing means, this device is fixed to described pad, described contact layer, described insulator and described sealing gasket on the described shell.
7. device according to claim 1, wherein said voltage device comprises:
Be arranged in the voltage lead of described shell; With
The positioning screwn spring that contacts with described voltage lead, described spring contacts with described erecting device.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/832,260 US5961096A (en) | 1996-04-03 | 1997-04-03 | Ferroelectric fluid flow control valve |
| PCT/US1998/026380 WO2000036301A1 (en) | 1997-04-03 | 1998-12-11 | Ferroelectric fluid flow control valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1327520A true CN1327520A (en) | 2001-12-19 |
| CN1125921C CN1125921C (en) | 2003-10-29 |
Family
ID=26794548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98814354A Expired - Fee Related CN1125921C (en) | 1997-04-03 | 1998-12-11 | Ferroelectric fluid flow control valve |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5961096A (en) |
| CN (1) | CN1125921C (en) |
| AU (1) | AU752367B2 (en) |
| NO (1) | NO20012844L (en) |
| WO (1) | WO2000036301A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110966167A (en) * | 2019-12-25 | 2020-04-07 | 重庆大学 | Piezoelectric micropump |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6880769B2 (en) * | 2001-12-17 | 2005-04-19 | Caterpillar Inc | Electronically-controlled fuel injector |
| US20050258715A1 (en) * | 2004-05-19 | 2005-11-24 | Schlabach Roderic A | Piezoelectric actuator having minimal displacement drift with temperature and high durability |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3174716A (en) * | 1962-10-15 | 1965-03-23 | Salter Jack Nelson | Magnetostrictive multiplier device |
| JPS6065968A (en) * | 1983-09-16 | 1985-04-15 | Hitachi Maxell Ltd | Curved piezo-electric actuator |
| JPS60118915A (en) * | 1983-11-30 | 1985-06-26 | Mitsubishi Electric Corp | Flow adjusting device |
| US4581624A (en) * | 1984-03-01 | 1986-04-08 | Allied Corporation | Microminiature semiconductor valve |
| DE3425290A1 (en) * | 1984-07-10 | 1986-01-16 | Atlas Fahrzeugtechnik GmbH, 5980 Werdohl | PIEZOCERAMIC VALVE PLATE AND METHOD FOR THE PRODUCTION THEREOF |
| JPS6228585A (en) * | 1985-07-30 | 1987-02-06 | Hitachi Metals Ltd | Piezoelectrically driven valve |
| JPS648482A (en) * | 1987-07-01 | 1989-01-12 | Oki Electric Ind Co Ltd | Device for retrieving sheet metal parts |
| DE3814150A1 (en) * | 1988-04-27 | 1989-11-09 | Draegerwerk Ag | VALVE ARRANGEMENT MADE FROM MICROSTRUCTURED COMPONENTS |
| WO1991001464A1 (en) * | 1989-07-19 | 1991-02-07 | Westonbridge International Limited | Anti-return valve, particularly for micropump and micropump provided with such a valve |
| GB2248891A (en) * | 1990-10-18 | 1992-04-22 | Westonbridge Int Ltd | Membrane micropump |
| US5471721A (en) * | 1993-02-23 | 1995-12-05 | Research Corporation Technologies, Inc. | Method for making monolithic prestressed ceramic devices |
| DE69431994T2 (en) * | 1993-10-04 | 2003-10-30 | Res Int Inc | MICRO-MACHINED FLUID TREATMENT DEVICE WITH FILTER AND CONTROL VALVE |
| US5802195A (en) * | 1994-10-11 | 1998-09-01 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | High displacement solid state ferroelectric loudspeaker |
| US5632841A (en) | 1995-04-04 | 1997-05-27 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Thin layer composite unimorph ferroelectric driver and sensor |
| US6168395B1 (en) * | 1996-02-10 | 2001-01-02 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Bistable microactuator with coupled membranes |
-
1997
- 1997-04-03 US US08/832,260 patent/US5961096A/en not_active Expired - Fee Related
-
1998
- 1998-12-11 CN CN98814354A patent/CN1125921C/en not_active Expired - Fee Related
- 1998-12-11 WO PCT/US1998/026380 patent/WO2000036301A1/en not_active Application Discontinuation
- 1998-12-11 AU AU17243/99A patent/AU752367B2/en not_active Ceased
-
2001
- 2001-06-08 NO NO20012844A patent/NO20012844L/en not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110966167A (en) * | 2019-12-25 | 2020-04-07 | 重庆大学 | Piezoelectric micropump |
Also Published As
| Publication number | Publication date |
|---|---|
| AU752367B2 (en) | 2002-09-19 |
| WO2000036301A1 (en) | 2000-06-22 |
| NO20012844L (en) | 2001-08-07 |
| US5961096A (en) | 1999-10-05 |
| CN1125921C (en) | 2003-10-29 |
| AU1724399A (en) | 2000-07-03 |
| NO20012844D0 (en) | 2001-06-08 |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |